I've watched the biochem ones and thought they were GOLD. The dude that does them really explains things well, and I honestly think I would be totally lost on biochem had I not watched them (reading the pathways on paper just made no sense to me). He's got some great tips/mnemonics and they've really helped me a ton on questions. I watched the Immuno ones because I'm weak in Immuno (had a really awful course at school) and I thought they were helpful for me but probably not necessary unless you feel weak in it (but the woman that teaches them is good). The Raymond pharm ones are pretty good, but I didn't get through them because I felt like I needed to spend time doing other things and pharm isn't one of my weaknesses. He makes a lot of good integrations though, so I kind of regret that I didn't manage my time better earlier to get through them. For physio, I've always been a little weak in cardio/resp, and I watched a few of those but ultimately also ran out of time for that. There's an Indian professor, forget his name, but he was really good.
I am weak in anatomy but felt like the anatomy videos were useless (dude literally reads off the page and adds nothing). Have heard good things about the neuroanatomy ones but didn't watch bc I'm good at neuroanatomy.
If you have the time, def watch the biochem ones and Raymond pharm. There's another pharm dude (I can't remember his name but he literally is bouncing off the walls with energy) who is ok too, esp for the "principles" of pharm. Haven't taken the test yet, but I'm really happy I watched biochem videos for sure, and the only reason I did that is because older students above me said that they thought they were clutch.
Hope this helps!